CN107488815A - A kind of medium temperature orientation silicon steel hot rolled strip and preparation method thereof - Google Patents
A kind of medium temperature orientation silicon steel hot rolled strip and preparation method thereof Download PDFInfo
- Publication number
- CN107488815A CN107488815A CN201710740901.8A CN201710740901A CN107488815A CN 107488815 A CN107488815 A CN 107488815A CN 201710740901 A CN201710740901 A CN 201710740901A CN 107488815 A CN107488815 A CN 107488815A
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- Prior art keywords
- silicon steel
- orientation silicon
- temperature
- preparation
- rolled strip
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/004—Dispersions; Precipitations
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
Abstract
The invention discloses a kind of medium temperature orientation silicon steel hot rolled strip and preparation method thereof.The preparation method in turn includes the following steps：Molten iron pre-processes, converter smelting, RH refinings, continuous casting, hot rolling.The steel band passes through rational Design of Chemical Composition, particularly severe control N element content, coordinate the technological parameters such as heat time and the temperature in control hot continuous rolling process each stage simultaneously, final production goes out to meet the orientation silicon steel hot rolling raw material of cold rolled annealed needs, ensure plate shape and surface quality, satisfactory orientation silicon steel finished product can be produced.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, more particularly to a kind of medium temperature orientation silicon steel hot rolled strip and its preparation
Method.
Background technology
Orientation silicon steel is widely used in electric power, electronics and national defense and military industry with its excellent soft magnet performance, is
A kind of excellent soft magnetic materials.Research shows that microstructure, the texture of orientation silicon steel determine macro property, and organize, texture
It is closely related with production technology, the technology controlling and process of orientation silicon steel hot rolled strip is helped to obtain the finished product of good magnetic property.
Some steel bands preparation technology disclosed in prior art, such as：The document of number of patent application 2011110273632.1 is public
Cloth Full production process of low-temperature oriented silicon steel, it is intended to which the slab heating temperature that solves traditional cold-rolled orientation silicon steel is high, heating furnace longevity
The technical problems such as short, energy waste are ordered, but concrete technology are introduced less.The advantage of this patent is to describe heating technique in detail
And rolling mill practice, accurate orientation silicon steel hot rolled strip production process can be controlled, can also play a part of saving the energy.
The document of number of patent application 201010597255.2 discloses a kind of preparation method of common orientation silicon steel, and use is cold
Even bundle mode pre-processes to hot rolled plate, improves hot rolled plate tissue, and hot rolled plate pretreatment coordinates with normalizing process, improves product
Magnetic property.Mainly the heating in rolling mill practice and Hot Rolling Parameters are described in detail for this patent, it is intended to obtain preferably
Hot rolling microstructure, prepared for cold-rolling process；And 250mm think gauge hot rolling slabs are employed, it is current domestic production orientation silicon steel
Maximum gauge hot rolling slab.
A kind of production of cupric low temperature high magnetic induction grain-oriented silicon steel of the patent disclosure of number of patent application 201510845174.2
Method, by controlling the content of Als and N, Sn element in material composition, more inhibitor is obtained, realize that improvement is secondary again
The effect of crystallization, so as to improve magnetic property, but hot rolling technology is introduced less.The advantage of this patent is to ensure a suppression of agent element
On the premise of content, hot rolling technology is introduced, the hot rolling microstructure got well, is cold rolling to ensure to separate out more inhibitor
Prepare.
The content of the invention
In order to solve the above technical problems, the present invention provides a kind of medium temperature orientation silicon steel hot rolled strip and preparation method thereof.
The present invention provides a kind of medium temperature orientation silicon steel hot rolled strip, and its composition includes in percentage by weight：
C：0.025%~0.040%, Si：3.10%~3.25%, Mn：0.15%~0.25%, P：≤ 0.015%, S：
0.009%~0.013%, Als：0.010%~0.025%, Cu：0.45%~0.55%, N：0.0080%~0.0130%,
Surplus is Fe and inevitable impurity.
The present invention also provides a kind of preparation method of above-mentioned medium temperature orientation silicon steel hot rolled strip, and it includes following step successively
Suddenly：Molten iron pre-processes, converter smelting, RH refinings, continuous casting, hot rolling.
Further, the continuous casting steel billet thickness obtained after continuous casting is 230mm~250mm.
Further, in course of hot rolling, heat-recovery section heating period, 89min time, preheating section time 39min, preheating temperature
1090 DEG C of degree, 33min between one section of added-time, one section of 1265 DEG C of heating degree, 39min between two sections of added-time, two sections of 1290 DEG C of heating degree,
Hot time 40min, 1290 DEG C of soaking temperature, time inside furnace ＞ 240min, 1290 ± 10 DEG C of tapping temperature.
Further, workpiece thickness 40mm during the hot rolling, roughing the first reduction in pass ＞ 50mm, F1 reduction ratio >=
50%, roughing R2 outlet temperature >=1110 DEG C, 950 ± 15 DEG C of finish rolling finishing temperature, 550 ± 15 DEG C of coiling temperature.
The present invention provides a kind of medium temperature orientation silicon steel hot rolled strip and preparation method thereof, the steel band by rational chemistry into
Set up meter, particularly severe control N element content separately, while coordinate heat time and the temperature in control hot continuous rolling process each stage etc.
Technological parameter, final production go out to meet the orientation silicon steel hot rolling raw material of cold rolled annealed needs, ensure plate shape and surface quality, can
Produce satisfactory orientation silicon steel finished product.
Brief description of the drawings
Fig. 1 is the metallographic structure figure of steel band prepared by the embodiment of the present invention 1.
Embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
The present invention provides a kind of medium temperature orientation silicon steel hot rolled strip, and its composition includes in percentage by weight：
C：0.025%~0.040%, Si：3.10%~3.25%, Mn：0.15%~0.25%, P：≤ 0.015%, S：
0.009%~0.013%, Als：0.010%~0.025%, Cu：0.45%~0.55%, N：0.0080%~0.0130%,
Surplus is Fe and inevitable impurity.
Accordingly, the present invention also provides a kind of preparation method of above-mentioned medium temperature orientation silicon steel hot rolled strip, and it includes successively
Following steps：Molten iron pre-processes, converter smelting, RH refinings, continuous casting, hot rolling.
Preferred scheme as the present invention：
The continuous casting steel billet thickness obtained after continuous casting is 230mm~250mm.
In course of hot rolling, heat-recovery section heating period, 89min time, preheating section time 39min, 1090 DEG C of preheating temperature,
33min between one section of added-time, one section of 1265 DEG C of heating degree, 39min between two sections of added-time, two sections of 1290 DEG C of heating degree, soaking time
40min, 1290 DEG C of soaking temperature, time inside furnace ＞ 240min, 1290 ± 10 DEG C of tapping temperature.
Further, workpiece thickness 40mm during the hot rolling, roughing the first reduction in pass ＞ 50mm, F1 reduction ratio >=
50%, roughing R2 outlet temperature >=1110 DEG C, 950 ± 15 DEG C of finish rolling finishing temperature, 550 ± 15 DEG C of coiling temperature.Finally give
Thick ferrite and tiny precipitate tissue.
The present invention provides a kind of medium temperature orientation silicon steel hot rolled strip and preparation method thereof, the steel band by rational chemistry into
Set up meter, particularly severe control N element content separately, while coordinate heat time and the temperature in control hot continuous rolling process each stage etc.
Technological parameter, final production go out to meet the orientation silicon steel hot rolling raw material of cold rolled annealed needs, ensure plate shape and surface quality, can
Produce satisfactory orientation silicon steel finished product.
One is entered to medium temperature orientation silicon steel hot rolled strip provided by the invention and preparation method thereof with reference to specific embodiment
Step description.
Embodiment 1
1st, composition
It is C by weight percentage that steel band, which smelts composition,：0.030%, Si：3.19%, Mn：0.22%, P：≤ 0.009%,
S：0.011%, Als：0.021%, Cu：0.47%, N：0.0099%, surplus is Fe and inevitable impurity.
2nd, smelting and continuous casting
Through converter smelting, after RH refinings prepare N element, it is 250mm strands that conticaster, which is cast into thickness,.
3rd, hot rolling
Walking beam heating furnace heats, and heating parameters are shown in Table 1.
Heating furnace heating parameters in the embodiment of the present invention 1 of table 1
| Project | Recuperation of heat | Preheating section | One adds section | Two add section | Soaking zone | Come out of the stove |
| Heating-up temperature | 93 | 44 | 38 | 44 | 51 | 270 |
| Heat time | 1120 | 1278 | 1304 | 1304 | 1298 |
Roughing uses 3+3 patterns, workpiece thickness 39.9mm, and the reduction in pass of roughing first is 51.4mm, F1 reduction ratios
It it is 1118 DEG C for 51.14%, R2 outlet temperatures, finish rolling finishing temperature is 938 DEG C, and coiling temperature is 552 DEG C, and being rolled into thickness is
2.28mm hot-rolled coil.
Fig. 1 is referred to, the figure is the metallographic structure figure of steel band prepared by the present invention, it can be seen that product is organized as slightly
Big ferrite and tiny precipitate.
Embodiment 2
1st, composition
It is C by weight percentage that steel band, which smelts composition,：0.034%, Si：3.23%, Mn：0.21%, P：≤ 0.011%,
S：0.011%, Als：0.018%, Cu：0.49%, N：0.0119%, surplus is Fe and inevitable impurity.
2nd, smelting and continuous casting
Through converter smelting, after RH refinings prepare N element, it is 230mm strands that conticaster, which is cast into thickness,.
3rd, hot rolling
Walking beam heating furnace heats, and heating parameters are shown in Table 2.
Heating furnace heating parameters in the embodiment of the present invention 2 of table 2
| Project | Recuperation of heat | Preheating section | One adds section | Two add section | Soaking zone | Come out of the stove |
| Heating-up temperature | 90 | 40 | 42 | 45 | 52 | 269 |
| Heat time | 1123 | 1275 | 1300 | 1301 | 1299 |
Roughing uses 3+3 patterns, workpiece thickness 40.2mm, and the reduction in pass of roughing first is 50.8mm, F1 reduction ratios
It it is 1117 DEG C for 54.32%, R2 outlet temperatures, finish rolling finishing temperature is 945 DEG C, and coiling temperature is 553 DEG C, and being rolled into thickness is
2.29mm hot-rolled coil.
Embodiment 3
1st, composition
It is C by weight percentage that the steel band, which smelts composition,：0.033%, Si：3.19%, Mn：0.23%, P：≤
0.010%, S：0.010%, Als：0.023%, Cu：0.53%, N：0.0109%, surplus is Fe and inevitable impurity.
2nd, smelting and continuous casting
Through converter smelting, after RH refinings prepare N element, it is 230mm strands that conticaster, which is cast into thickness,.
3rd, hot rolling
Walking beam heating furnace heats, and heating parameters are shown in Table 3.
Heating furnace heating parameters in the embodiment of the present invention 3 of table 3
| Project | Recuperation of heat | Preheating section | One adds section | Two add section | Soaking zone | Come out of the stove |
| Heating-up temperature | 91 | 47 | 38 | 45 | 57 | 278 |
| Heat time | 1125 | 1272 | 1302 | 1303 | 1301 |
Roughing uses 1+3 patterns, workpiece thickness 40.02mm, and the reduction in pass of roughing first is 51.8mm, F1 reduction ratios
It it is 1116 DEG C for 55.04%, R2 outlet temperatures, finish rolling finishing temperature is 941 DEG C, and coiling temperature is 557 DEG C, and being rolled into thickness is
2.30mm hot-rolled coil.
Above to medium temperature orientation silicon steel hot rolled strip provided by the present invention and preparation method thereof.It is described in detail.
Specific case used herein is set forth to the principle and embodiment of the present invention, and the explanation of above example is simply used
Understand the method and its core concept of the present invention in help.It should be pointed out that for those skilled in the art,
Under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification
Fall into the protection domain of the claims in the present invention.
Claims (5)
1. a kind of medium temperature orientation silicon steel hot rolled strip, it is characterised in that its composition includes in percentage by weight：
C：0.025%~0.040%, Si：3.10%~3.25%, Mn：0.15%~0.25%, P：≤ 0.015%, S：
0.009%~0.013%, Als：0.010%~0.025%, Cu：0.45%~0.55%, N：0.0080%~0.0130%,
Surplus is Fe and inevitable impurity.
2. claim 1 medium temperature orientation silicon steel hot rolled strip preparation method, it is characterised in that include following step successively
Suddenly：Molten iron pre-processes, converter smelting, RH refinings, continuous casting, hot rolling.
3. the preparation method of medium temperature orientation silicon steel hot rolled strip according to claim 2, it is characterised in that obtained after continuous casting
Continuous casting steel billet thickness be 230mm~250mm.
4. the preparation method of medium temperature orientation silicon steel hot rolled strip according to claim 3, it is characterised in that course of hot rolling
In, heat-recovery section heating period, 89min time, preheating section time 39min, 1090 DEG C of preheating temperature, 33min between one section of added-time,
One section of 1265 DEG C of heating degree, 39min between two sections of added-time, two sections of 1290 DEG C, soaking time 40min of heating degree, soaking temperature 1290
DEG C, time inside furnace ＞ 240min, 1290 ± 10 DEG C of tapping temperature.
5. medium temperature orientation silicon steel hot rolled strip preparation method according to claim 4, it is characterised in that in during the hot rolling
Between base thickness 40mm, roughing the first reduction in pass ＞ 50mm, F1 reduction ratio >=50%, roughing R2 outlet temperature >=1110 DEG C,
950 ± 15 DEG C of finish rolling finishing temperature, 550 ± 15 DEG C of coiling temperature.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108941198A (en) * | 2018-05-24 | 2018-12-07 | 北京首钢股份有限公司 | A kind of strip processing method of the high silicon orientation silicon steel of medium temperature |
| CN110340144A (en) * | 2019-07-02 | 2019-10-18 | 北京首钢股份有限公司 | A kind of hot rolling method of thin gauge ultra high silicon silicon steel |
| CN111593267A (en) * | 2020-05-07 | 2020-08-28 | 包头钢铁（集团）有限责任公司 | Laboratory low-temperature high-magnetic-induction oriented silicon steel hot-rolled steel strip and preparation method thereof |
| CN112226695A (en) * | 2020-10-16 | 2021-01-15 | 马鞍山钢铁股份有限公司 | High-performance hot-rolled oriented silicon steel plate and production method thereof |
| CN113953335A (en) * | 2021-09-16 | 2022-01-21 | 包头钢铁（集团）有限责任公司 | Manufacturing method for eliminating hot-rolled edge cracks of oriented silicon steel |
| CN115383408A (en) * | 2022-09-09 | 2022-11-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Rolling process of high-manganese non-magnetic steel |
| CN115627313A (en) * | 2022-09-22 | 2023-01-20 | 宁波钢铁有限公司 | Oriented silicon steel hot rolled plate and production process thereof |
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| CN108941198A (en) * | 2018-05-24 | 2018-12-07 | 北京首钢股份有限公司 | A kind of strip processing method of the high silicon orientation silicon steel of medium temperature |
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| CN110340144A (en) * | 2019-07-02 | 2019-10-18 | 北京首钢股份有限公司 | A kind of hot rolling method of thin gauge ultra high silicon silicon steel |
| CN110340144B (en) * | 2019-07-02 | 2021-01-08 | 北京首钢股份有限公司 | Hot rolling method for thin-specification ultrahigh silicon steel |
| CN111593267A (en) * | 2020-05-07 | 2020-08-28 | 包头钢铁（集团）有限责任公司 | Laboratory low-temperature high-magnetic-induction oriented silicon steel hot-rolled steel strip and preparation method thereof |
| CN111593267B (en) * | 2020-05-07 | 2022-02-25 | 包头钢铁（集团）有限责任公司 | Laboratory low-temperature high-magnetic-induction oriented silicon steel hot-rolled steel strip and preparation method thereof |
| CN112226695A (en) * | 2020-10-16 | 2021-01-15 | 马鞍山钢铁股份有限公司 | High-performance hot-rolled oriented silicon steel plate and production method thereof |
| CN113953335A (en) * | 2021-09-16 | 2022-01-21 | 包头钢铁（集团）有限责任公司 | Manufacturing method for eliminating hot-rolled edge cracks of oriented silicon steel |
| CN115383408A (en) * | 2022-09-09 | 2022-11-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Rolling process of high-manganese non-magnetic steel |
| CN115627313A (en) * | 2022-09-22 | 2023-01-20 | 宁波钢铁有限公司 | Oriented silicon steel hot rolled plate and production process thereof |
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